I have now got 3 toodledo subscriptions and 3 Ultimate licenses . All looks like it will work well BUT I no no longer have the fantastic feature of adding a Task via the notification bar which the official app did well.

this setup has now raised more issues but I am sure the people at Ultimate will be able to help. My main ones are widget text size and working out exactly what "calendar integration" means

Jay. Glad I could help. Reg. Calendar Integration :
'Toodledo website' offers an iCal link for task events that can be subscribed into Google Calendar. This updates only once a day, sometimes longer.
'Ultimate To Do List' allows direct entry of task events into Google Calendar via its custom API design. After clicking/ticking the little box in the event details, it immediately enters it into the Google calendar (with specific reminder if required - this feature doesn't integrate with Toodledo but is useful for important tasks/events). One can even go into Google calendar and shift the task event and the changes will be reflected in Ultimate (but sadly not in Toodledo yet).
Hope Toodledo develops such a system for it web and android app soon.